Drill-chuck.



W. FULLER.

DRILL CHUCK.

.APPLIOATION FILED JUNE 19. 1909.

I Patented July 12,1910' Way WITNESSES V ATTORNEYS To an whom it may concern:

UNITED srarns PATENT orrron qmmr WALTER FULLER, OFHACHITA, TERRITORY OF NEW mnxrco, ASSIGNOR or- ONE-FOURTH 'TO NOAH HAYDON, ONE;FOURTH TO A. E. TRIMBLFE, AN D ONEFOUR' IH T0 OTTO F. BEER, ALL OF HACHITA, TERRITORY OF NEW- MEXICO.

' DRILL-CHUCK.

Be it known that I, HnNnr 1V FULLER, a

chita, Grant county, Territory'of New Mexico, have invented an Improvement in Drill- Chucks, of which the following is a specification.

My invention is an improvement in that class of drill-chucks in which a piston is actuated by steam or compressed air. The drill is usually connected with. the piston by means of a device in the nature of a clamp.

The object of my invention is to effect this result by substituting a device operated by air or steam pressure, the piston being provided with a longitudinal passage for conducting the fluid to the chest or cylinder in which the piston reciprocatcs, such fluid acting upon a movable chuck or clamp arranged in the outer end of the piston, whereby when subjected to pressure it fastens the drill, and when pressure is removed, the drill is in turn released.

The details of construction, arrangement, combination and operation of parts are as hereinafter described and illustrated in the accompanying drawing in which Figure 1 is a 'side view of the piston rod and chuck-head in which the drill proper is secured. Fig. 2 is alrenlarged longitudinal section of the chuck-head or outer end of the piston in which the drill is secured. Fig. 3 is a longitudinal section on the line 3.3 of Fig. 2. Fig. 4 is a perspective view of the drill-head.- Fig. 5 is a cross section of the chuck-head taken through the center of the latter. Fig. 6 is an end view of the chuckhead. Fig. 7 is a perspective view of the drill clamp or chuck.

Referring in the first instance to Fig. 1, A indicates a piston having two heads a which are provided with circumferential grooves b for receiving packing. The piston 1s cut away or reduced in diameter at c between the heads a whereby a chamber is provided for constant access of air or steam. From this part c, a passage 03 leads through the piston rod A to the chamber 6 formed in the enlarged outer end of the same which portion, for convenience of description, I term a chfucbhead, since it is provided with a cavity If to receive the drill avg-see F igs, 1, 2, 3. T18 chamber 6 is preferably cylin- Specification of Letters Patent.

Application filed June 19,1909 Serial Elm-503,086. H

di ill clamp or chuck C. This'is, provided, with a clrcumferentlal groove to. receive packing and the outer side 03-." the same is vides for entrance of air or steam in the.

chamber 6 even when the clamp or chuck is in contact with the outer wall of the chamber. As shown best in Figs. t and 7, the chuck C is provided on its inner. side with two arallel wings or jaws i which embrace the sides of the drill-head and enga e shoulders thereof as shown in Figs. and 4. As shown in Figs. 3 and 5, the space between the jaws z' of the chuck is less than the diameter of the drill-head, and furthet, the said jaws are arranged in mortises or recesses formed in the inner side of the socket f. Thus while the jaws i engage the shoulders of the drill they also engage the shoulders of the chuck-head. It is obvious that when the clamp or chuck C is in the position indicated in Figs. 2, 3, 4:, the drill will be held in the socket f of the chuck-head, and such position of the chuck will be maintained so long asthere is due air or steam pressure on the chamber 9 of the truck. The air or steamfor thispurpose is preferably supplied from a different source than that required for operatin i. e. reciprocating the piston. It. will ever, thatv the air or steam-passing through the duct (1 is admitted independently of the air or steam applied to the piston, and the un erstood, how- Patented d uiy d2,'1 910. i

drical and in ,it is arranged the head of the Jib whether the piston reciprocates or not; for

this purpose the pipe 5 is provided which takes its supply. of air or steam in front of the stop valve 3 that admits the fluid to the piston, and, therefore, air or steam will always pass through the duct d, unless shut off by the three-way cock 8 provided for this purpose. The stop valve 3-serves only to cut off or admit am or steam to operate the iston and has nothin to do with the fluid or tightening the dril in the chuck-head.

When the chuck C is relieved of air or steam pressure, it is raised out of enga ement with the drill a: by means of coi ed springs j, which as shown in Fig. 5, are arranged 1n sockets formed in the chuck-head B and beneath slidable stems k whose outer ends bear on-the enlarged head of the chuck C. Thus ,when air or steam is admitted to the chamber e of the chuck-head, its pressure overcomes the tension of the springs j which are-then compressed, but when" air or steam pressure .is relieved the resiliency of the springs j forces the Chuck 0 outward far enough to disengage it from the drill.

What I claim is:

1. The combination with a piston rod piovided with an air or steam passage and a chuck-head forming the enlarged outer end of the piston, the same being provided with a drill socket and; a lateral chamber with which said passage communicates, a drill I chuck arranged in'said chamber and rovided on its inner side with parallel aws for engagin' the head of a drill, its outer side being c lambered and provided with a peripheral notch for admission of air or steam, as shown and described.

2. The combination, with .a iston and chuck-headformed thereon an provided with a drill socket, said piston and chuck head having a fluid passage and a lateral chamber e communicating with said passage, of a drill fastening consisting of a device that is movable laterally in the chamber of the chuck-head and wherein it is subjected to pressure of the fluid, the drill fastening being provided with jaws for enga 'ing v the drill-head when rojected into the drill socket, as shown and described.

HENRY WALTER FULLER. Witnesses:

Josnrn, 1t. LE Dun, CLAUDE E. LAW. 

